Padlock



(Model.)

W. D. BRYANT. PADLOGK.

No. 439,635. Patented Nov. 4, 1890.

i UNITED STATES PATENT OFFICE.

WILLIAM DEACON BRYANT, OF BROOKLYN, NEV YORK.

PADLOCK.

SPECIFICATION forming part of Letters Patent No. 439,635, dated November 4, 1890.

Application filed August 9, 1890. Serial No. 361,505. (Model.)

To all whom it may concern:

Be it known that I, WILLIAM DEAcoN BRY- ANT, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Padlocks; and I do declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to an improvement in padlocks; and it consists in the construction and arrangements of parts hereinafter described, and definitely pointed out in the claims.

The object of my invention is to provide a simple, inexpensive, and durable padlock and one which will be strong and durable, embodying a minimum number of parts, and at the same time prevent picking. I obtain this object by the construction illustrated in the accompanying drawings, wherein like letters of reference indicate corresponding parts in the several views, and in which- Figure 1 is an elevation of a completed lock. Fig. 2 is a longitudinal vertical section through the casing. Fig. 3 is a cross-section on the line X X of Fig. 2. Fig. 4 is a section on the line Y Y of Fig. 2. Fig. 5 is a detail of the key. Fig. 6 is a detail of the tumbler-cylinder, and Fig. 7 is a detail plan view of the bolt-actuating arms.

In the drawings, A represents the casing, formed in a circular shape, with guideways a in its outer portion for the reception of the shackle B, the latter being curved to correspond to the curvature of the casing in which it slides.

C represents a key-post rigidly secured in the center of the casing, on which is placedA a cylindrical tumbler D, which, as shown in Fig. 6, has a vertical groove d in its side extending to a point adjacent to the bottom thereof. On this tumbler two radiating parallel arms E E are loosely placed, they consisting of metal bars having circular openings e in their ends, through which the tumbler passes, and lugs e', extending into the openings and into the groove d of the tumbler, thereby preventing an independent movement of the tumbler, and arms sleeved on the tumbler. Between the arms is a spring F, which normally forces the arms apart and into contact with the casing. The outer ends of the arms are pivotallysecured to the inner end of the shackle, so that a movement of the arms carries the shackle back and forth, as the case may be.

On the sides of the casing, directly opposite each other, are two inclined planes or locking projections G, having horizontal upper edges. These projections are located adjacent to the upper portion of the casing a distance equal to the width of the arms.

In Fig. 5 I have shown the key H, which is formed with a hollow shank and a cut-out portion h and an inclined lifting-tooth h.

The operation is as follows: When the shackle is to be locked, it is forced around to the position shown in Fig. 2, the arms being forced out by the spring and secured in place by the inclined planes on the casing, thus securely locking the shackle in place and preventing its backward movement. When the shackle is to be drawn back, the key is inserted, entering the tumbler, the lugs in the openings in the arms entering the groove in the key. The key is then turned, the inclined lifting-tooth on its end engaging the lug on the lower or rear arm and forces the arm up', while the pressure on the lug on the top arm, which comes in contact with the top wall of the groove in the key, forces the same down. The arms thereby escape the incline, and the shackle is permitted to swing back.

I am aware that many minor changes in the construction and arrangement of the parts of my device can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a padlock, the combination, with the casing having inclined projections on its inner face, of a shackle working in and out of the casing, a central tumbler, arms loosely secured on the tumbler and pivotally connected IOO to the shackle, a spring for normally holding the inner ends of the arms apart, und 2L key for forcing the arms in to escape the projections, substantially as described.

2. In a padlock, the combination, with the casing hzwinginclined looking projections on its inner face, of a shackle, independent firms pivoted to the shackle, a grooved tumbler 1ooated centrally in the casing, :i spring inter- 1o posed between the arms on the tumbler, lugs on the :mns entering the groove in the tumbler, and i key having a groove and an inclined tooth, substantially as described.

In testimony whereof Izifiix 1n y signature in presence of two Witnesses.

WILLIAM DEACON BRYANT. Witnesses:

THOMAS FOULKS, LLOYD BRYANT. 

